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Salary
≈ $32k – $85k per year (Estimated)
Location
In office (Lisbon)
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 16, 2026. First seen by Alion on Sep 24, 2026.

Overview
Company
Impact
Profile match
Celfocus is a Portuguese technology company founded in 2000 as a joint venture between Novabase and Vodafone. It builds operations and business support systems, digital channels and analytics for telecom operators. The company delivers projects for carriers across Europe, Africa and the Middle East.

Make an impact by working in sectors where technology is the enabler and innovation is the key.

At Celfocus, we make data actionable through Next-Gen Intelligence - where data, AI and human creativity come together.

You’ll work with multidisciplinary teams and partner with leading companies to turn data into decisions, agility and long-term value.

Explore your way in.

The opportunity:

We are looking for Application Security Analysts to join our Celfocus team. The role involves performing application security assessments throughout the software development lifecycle, including threat modeling, security analysis, and penetration testing of web applications. You will work closely with analysts, architects, developers, DevOps teams, and other stakeholders to identify and mitigate security risks, conduct manual and automated security testing, and contribute to the secure development of Celfocus products and projects.

Your day-to-day:

  • Conducting analysis and threat modeling for new and existing Celfocus products/projects.

  • Analyzing and discussing requirements; interacting with all participants in the software development process.

  • Penetration testing web applications.

  • Conducting both manual and automated testing.

  • Participating in the creation and development of the company's products at all stages of their life cycle.

What you'll bring:

  • A lively and flexible mind, clear logic, a detail-oriented approach.

  • Capability to align with teams from Analysts, Designers, Architects, Developers to DevOps.

  • Knowledge of HTTP.

  • Working knowledge of programming languages.

  • Knowledge of the Top 10 OWASP vulnerabilities: how to find, exploit and fix them.

  • Knowledge of Burp Suite or other popular web scanners like ZAP, Acunetix, Netsparker, etc.

  • The desire and ability to work in a team.

  • The desire to develop yourself in the field of application security.

  • Knowledge of English at least at the level of reading technical documentation.

Additional qualifications:

  • Good knowledge of Linux or Windows operating systems.

  • Skills in scripting and automating your work using Powershell, Python, Bash, etc.

  • Knowledge of the OWASP Application Security Verification Standard (ASVS) , OWASP Testing Guide and experience in whole product or feature planning.

  • An understanding of browser security mechanisms (SOP, cookies, CSP, HSTS, etc.)

  • Familiarity with various protocols and attacks against them (OAuth, JWT, websockets, etc.)

  • Experience with public clouds (Azure, AWS, GCP)

  • Experience with pipeline Orchestrators (Jenkins, Azure DevOps, GitLab CI/CD)

  • Penetration testing experience

Personal Traits:

  • Ability to adapt to different contexts, teams and Clients

  • Teamwork skills but also sense of autonomy

  • Motivation for international projects and ok if travel is included

  • Willingness to collaborate with other players

  • Strong communication skills

What’s in it for you:

  • Hybrid way of working with flexibility and balance
  • Opportunity to work on international projects
  • Possibility to explore different roles and career paths
  • Continuous learning and development opportunities
  • A growing AI-driven environment, working with the latest technologies
  • A set of benefits and perks to support your day-to-day

A place for everyone

At Celfocus, we are committed to cultivate a diverse and inclusive workplace. As an equal-opportunity employer, we welcome applicants of all backgrounds, gender identities, and abilities.

If you require any adjustments during the selection process, please inform our Talent Acquisition Team.

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